Carlos's graph of the rational function f(x)=x2−7x+10x2−x−20 is below. His graph is used to help him navigate an underwater cave. Carlos lists values to check his graph of the rational function and discovers that his graph has a hole that he overlooked. The actual cave has a boulder at the location of the hole, and Carlos will have to swim around the boulder. What is the x value at the boulder's location? Enter the value in the blank.

Afriend of mine is giving a dinner party. his current wine supply includes 10 bottles of zinfandel, 8 of merlot, and 11 of cabernet (he only drinks red wine), all from different wineries. (a) if he wants to serve 3 bottles of zinfandel and serving order is important, how many ways are there to do this? ways (b) if 6 bottles of wine are to be randomly selected from the 29 for serving, how many ways are there to do this? ways (c) if 6 bottles are randomly selected, how many ways are there to obtain two bottles of each variety? ways (d) if 6 bottles are randomly selected, what is the probability that this results in two bottles of each variety being chosen? (round your answer to three decimal places.) (e) if 6 bottles are randomly selected, what is the probability that all of them are the same variety? (round your answer to three decimal places.)

Ireally don't understand this, i'm really an idiot but i want to know how to figure this out. !

Mr. chen is parking in a lot downtown. the graph shows the relationship between the time and the total cost of parking. evaluate the function for and input of 10.